Dealer Signup Information. The 37th National Sports Collectors Convention will be held August 3-August 7, 2016 at the Atlantic City, NJ Convention Center. A limited number of dealer booths are currently still available.ealer Signup Information. The 37th National Sports Collectors Convention will be held August 3-August 7, 2016 at the Atlantic City, NJ Convention Center. A limited number of dealer booths are currently still available.
Carbon has by definition 6 protons. However, its many isotopes can have anywhere from 2 neutrons to 16 neutrons, with 6 neutrons being the most common (~95% of all carbon). Carbon has by definition <b>6 protons</b>.
According to HowStuffWorks, an atomic mass unit is defined as the mass of a single proton or neutron. Hydrogen, the lightest element, has an average mass of 1.00794 amu. A carbon-12 atom is made up of six protons and six neutrons, hence 12 atomic mass units. The mass of the electron is considered negligible, therefore electrons are not counted in measuring an atom's atomic mass.